You can eject (legal term) them immediately.  

Any ideas on how much it costs and any referrals for ejectment lawsuit?

When the four words in my title here are used, typically you can expect to hear some nostalgic idiot go on about his many cognitive dysfunctions about how wonderful the past was and how hard and miserable times today are.This is not one of those times.What I'd like to ask in this discussion is: what limiting beliefs did you have to eject along the way of your investing journey in order to succeed?

Your contractor was good to advise you to get a second opinion.I will also install a sewage ejection pump in our primary for a bathroom addition (well my plumber is), from my research, im going with a grinder pump.

Presently inhabited by tenants with plans to eject them if necessary.

I don't know who I would file an ejectment against.

Do the new owners have to start the eviction/ejection process? 

If they are squatters you will have to go through an ejectment which is lengthier and more expensive than an eviction.

Once you give those notices, you typically start an ejectment action instead of a foreclosure action to recover a possession.

I have read online that an ejectment procedure could help with removing risk of wrongfully removing personal property.